Add user notes on accounts (#14148)

* Add UserNote model

* Add UI for user notes

* Put comment in relationships entity

* Add API to create user notes

* Copy user notes to new account when receiving a Move activity

* Address some of the review remarks

* Replace modal by inline edition

* Please CodeClimate

* Button design changes

* Change design again

* Cancel note edition when pressing Escape

* Fixes

* Tweak design again

* Move “Add note” item, and allow users to add notes to themselves

* Rename UserNote into AccountNote, rename “comment” Relationship attribute to “note”

app/models/account_note.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+# == Schema Information
+#
+# Table name: account_notes
+#
+#  id                :bigint(8)        not null, primary key
+#  account_id        :bigint(8)
+#  target_account_id :bigint(8)
+#  comment           :text             not null
+#  created_at        :datetime         not null
+#  updated_at        :datetime         not null
+#
+class AccountNote < ApplicationRecord
+  include RelationshipCacheable
+
+  belongs_to :account
+  belongs_to :target_account, class_name: 'Account'
+
+  validates :account_id, uniqueness: { scope: :target_account_id }
+end

app/models/concerns/account_interactions.rb

@@ -44,6 +44,14 @@ module AccountInteractions
       follow_mapping(AccountPin.where(account_id: account_id, target_account_id: target_account_ids), :target_account_id)
     end
 
+    def account_note_map(target_account_ids, account_id)
+      AccountNote.where(target_account_id: target_account_ids, account_id: account_id).each_with_object({}) do |note, mapping|
+        mapping[note.target_account_id] = {
+          comment: note.comment,
+        }
+      end
+    end
+
     def domain_blocking_map(target_account_ids, account_id)
       accounts_map    = Account.where(id: target_account_ids).select('id, domain').each_with_object({}) { |a, h| h[a.id] = a.domain }
       blocked_domains = domain_blocking_map_by_domain(accounts_map.values.compact, account_id)